1001002201020 has 72 divisors (see below), whose sum is σ = 3052270690560. Its totient is φ = 265536351360.

The previous prime is 1001002201007. The next prime is 1001002201039. The reversal of 1001002201020 is 201022001001.

1001002201020 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 1001002200993 and 1001002201011.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14523535 + ... + 14592294.

It is an arithmetic number, because the mean of its divisors is an integer number (42392648480).

Almost surely, 2^{1001002201020} is an apocalyptic number.

1001002201020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1001002201020 is an abundant number, since it is smaller than the sum of its proper divisors (2051268489540).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1001002201020 is a wasteful number, since it uses less digits than its factorization.

1001002201020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29116035 (or 29116030 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 1001002201020 its reverse (201022001001), we get a palindrome (1202024202021).

The spelling of 1001002201020 in words is "one trillion, one billion, two million, two hundred one thousand, twenty".